Gauge cock



June 14, 1927. l1,453.2,403

J. W. GRANTLAND GAUGE CO CK 'Filed oct. so, 1925 alito: e134 PatentedJune 14, 1927.Y Y

UNITED fsreif.ENSl PATENT OFFICE- iroHN WALTER dRANTIiANno'n CINCINNATI,oHIo, AssIeNon'To THE EDNA BnAss MANUFACTURING COMPANY, on` CINCINNATI,oIIIo, A ConronATIoN or oIIIo. y

"1 GAUGE COCK.

Application iled October 30, 1925.v Serial No. 65,853.

This invention relates generally to1iinprovenients in valveconstruction, and is particularly directed to a typek of valve used inconnection with boiler `gauge glasses, land commonlyl called a gaugecock.

An object'of the present invention is to provide a'valve wherein renewalotvalve seat may be `made Iwithout requiring the valve `body asawhole'to `be disconnected `from the ygauge glass, and 'furtlierlto allowthe renewalio'f valve scatto berna-de while the-boileris under steam.I ff l Y Another object is'to `provide a valve coinprising two membersconnected together in co-aXial relation by* a lunion coupling member,the valve seat being engaged between the butting ends of the couplingymembers for producing a steam tight joint, 'and tor :forming a valveseat engageable-by a trans ylatable` valve for controllingfluiddischargefrom the'valve body. This. valve vseat soon deteriorates orwears andlitsrenewal is trequently necessary. The ordinary valves are so constructedthat this renewal cannot be made whenthe boiler `is Vunder.steam,-ex-

cept by removing the wheel"handle,r the packing nut,- andA withdrawingthe bonnet entirely from, thestem, and repacking at the Vpackingnutonthe stem@ Another object of the invention is to provide aV valve stemcomprising telescopically engaged sections,l one asavalveV-closingmember operable fin thel body vofwthelvalve Yand adapted to be seatedkbyrotation, in either direction, andthe other azmain stem memberrotatable, but non-translatable, in

, the bonnet for operating the first section `to obtain a seatingactioiioi a `valvefclosing member, permitting thehand operable sectionto be removed whileV the valveclosing member remains seated. By Ithismeans the couplingfmember between theY body and bonnet `sections* can beloosened andvthe bonnet and hand operable stem section bodilyrremoved. a

Another object ott the invention isto provide a gaugecoclr, in which`tlie passages of the bonnet/are accessibleior inspection without thenecessity ior removing the stem.

Another object of the invention is to provide a `gauge cock` having-.atwo-part stem only one oif: the 'parts ot..w.hich. 4travels to open orclose the main 'or 'repair seat.

@ther obj ectsA :and certain advantages lv1/lill et the accompanyingdrawings forminga part otthisispeciiication, 4in which:

Figure 1 is a longitudinal .section through a valve construction inaccordance Withithis invention, showingy the discharge ,control valveclosed and thevrepai-r inletvalveopen. L

`Figure 2 is a cross section on` line 2-2 of Fig. 1..

n Figure 3 i's across section on lined-3 of Fig. 1.

lteriorly taper threaded ,at one endas at? 6 for attachment to*thefgauge, or other Adevice `upon which itistoybe `Vused. l The oppositeend ot the body lhas an exterior circumferen- "tial flange 7' adaptedfor engagement by-a Figure 4c is a cross section on line 1f-1ctcorresponding terminal :inner flangel Soit the coupling nut orunionyandthisflange is .circularly recessed-as at"v 9 .to "formfapocket for valveseat 10 interposed bot-Ween the butting ends of the sectionsl and2. ringis the valve lseat against which acompanion valve closing member seatsfor-controlling the flow from the gauge cock.` A short'. distance:inwardlyI from the flange', the .en-

larged-passage is threaded as at 1115er covaction 'with thelcorresponding exterior threads 12 of a seat engaging section 15,- of atwo-part stem comprising telescopical-ly engaged sections. Thisseat-engaging valve Jsection. 15 has a doublev function, that is,`it isdisposed between `and controls inlet andeutlet passa ges'respectivelyxaccording .toits direction oftranslation. `'Iliesection15. has a vspherical seating end 16, engageable with a Aconical valveseat 17 formedin the inner end of the small .passage of `the body 1.`The threadedportion of the valvesection 16`is oi Y larger diameter andla reduced,counter-turned portion-19 is V .pi

qded, anda shoulde 18 Vformed *which i 'P torsione the @peni a totfurther machined to make itnon-circular in cross section and thisnon-circular portion 1s adapted totelescopically engagewithin anfopening 32 of the hand operable portion 20 of the two-part stem, whichlatter portion is rotatably mounted in the bonnet. This non-circularportion 19 is preferably square cross section and is longitudinallygrooved onA each face as at 21 to provide rsteain passages adapted toestablish communication between the receiving and discharge passages ofthe valves. The threaded portion is also longitudinally grooved as at 22to further provide communication between the passages, when the valve isnot seated, as shown in Figure 1.

'The head or bonnet section isbored and counter-bored to providecircular bore portions 25, 26, 27, of three 'different diameters, andalso to provide two shoulders 28, 29. The intermediate bore portion 26lis partly threaded as at 30, the threads extending inwardly from thebore'port-ion 27. This portion-26r is adapted to receive the enlargedcylindric'al terminal head 31 of thehand operable section 2O.V Theenlarged head 31 provides a broad centering bearing for the stem 20y andfurther provides a shoulder33 engaged-with the shoulder 28- ofthe bonnetto prevent stem translation in outward direction.- AThis head portion isprovided with al non-circularbore 32 corresponding in' cross section tothat of the squared portion 19 of the member 15. Thel hand operableportion of the' stem is rotatablein either direction of the bonnet forcorrespondingly rotating valve-section 15 to translate the vsame to aseatin position eitherlagainst the seat 10 or wit in the conical seat17. i

A fianged nut orgland 35 is engaged within the bore 26 an'd withthe'threads 30 to prevent inward translative motionv of the handoperable portion 20. This nut has a circular boreJ 36` 'through whichthe squared part 19 freely passes. The seat 10` engages flatly againstthe outer face of the nut 35,

andY the thick-ness of the lllea-d of the nut is less than the depth ofthe bore portion 27 to form a socket for the seat. Therefore, the seatwhen in operative position is held in pockets respectively carried bythe bonnet and the body 1. Y v

It willbe noted that the stem 20" does not project through the seat 10,but only the reduced non-circular portion of the member 15 extendstherethrough thus providing a' maximum seating area for engagement bytheV shoulder 18, withl the requirementl of the minimum of borey area 4of the body 1-.

The seat 10 is of annular coniguration and its bore is freely traversed`by the noncircular extensionof the memberV t5.

The4 enlargement 31- of the hand operable portion 2O is slotted as at 37to provide a passage Communicating with an annular passage 38 of thebonnet, which annular passageV stem and with these threads to? compresspacking engaged about theI stem 20.

The provisionofal stem formed of two parts telescopically engagedpermits one of the parts to be seated for closing the valve, and tonremain seated while the bonnet and parts carried thereby are bodilyremoved, to permit of the renewal of the valve seat 1 0, withoutrequiring the boiler to which the gauge valveis attached to be shutdown, or without requiring removal of the valve as a whole.y v

The construction of the hand operable portion' of the stem and itsarrangement in the bonnet also permits inspection of the' passages 32and 37 in the bonnet,- wit-hout removing th'e sternl 20. This inspectioncan be readily made by disconnecting the kcoupler 3, after which' thebonnet is disengaged from t-he reduced portion 19 ot the valvevsectionexposing the passages 32, 37, and 39, without having to remove the wheelhandle or in anyway disturbing the packing around the rotatable outerstem.

As shown in Figurey 1, the discharge valve is v closed and the renewableseat is open. When it is desired to renew the seat 10,-the handle isrotated to force the projection 16 into the seat 17 The coupler 3 isthen un- `screwed whereafter the bonnet section and `to open the valve,the member 20 is again turned to separa-te the-shoulder from the seat10, the translation being suflicient to cause this separation withoutseating. the spherical end 1-6:

Having. described my invention,` I claim:

through the bonnet, a nut within the bonnet securing said first steinpart against translation, the second valve stein part threaded in thevalve body between the renewable valve seat and the valve seat in thebody, said second stein part adapted to seat on either valve seatselectively.

2. A valve, comprising, a valve body having` a valve seat therein, abonnet removably secured to the body, a renewable valve seat disposedbetween said valve seat and bonnet, a two part valve stem one part handro-V tatably extending through the bonnet, said part provided with arecess inside of the bonnet, said recess communicating with the bonnetoutlet, av nut Within the bonnet securing said first stem part againsttranslation, the second valve stein part threaded in the valve bodybetween the renewable valve seat and the valve seat in the body, saidpart adapted to seat on either valve seat selectively, and a splinedconnection between the inner end of the first valve stein part and thesecond valve stem part.

In witness whereof, I hereunto subscribe my name.

JOHN WALTER GRANTLAND.

